Amazon's GameCircle, released to match the likes of Apple's GameCenter, allows players to track achievements, see themselves on leaderboards and sync their game data in the cloud. Since its release, only specific Kindle devices could take advantage of...

Today, Amazon introduced GameCircle. And yes, it is just like Game Center that Apple has built in for iOS. With GameCircle, users can now track certain achievements in a game, keep up with global leaderboards, and also save a game's progress to the cloud for...